1.

In the adjoining figure the potential difference between X and Y is 60 V . The potential difference between the points M and N - will be

Answer»

10 V
15 V
20 V
30 V

Solution :
In the given FIGURE , capacitors 2C, C (between M and N) and 2C are in SERIES . If Q is the charge on each of these capacitors , then
`60=(Q)/(2C)+(Q)/(C)+(Q)/(2C)=(2Q)/(C)rArrQ=30C`
Potential differece between M and N is
`(Q)/(C)=(30C)/(C)=30V`


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